<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>新增商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card class="box-card">
      <el-alert title="新增商品信息" type="info" show-icon :closable="false" center></el-alert>
      <el-steps :space="200" :active="currentStep - 0" finish-status="success" align-center >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm" label-position="top" >
        <el-tabs v-model="currentStep" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="catCasProps"
                @change="catCasChange"
                clearable
                filterable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">.
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id">.
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture" :headers="headersObj"> 
              <el-button size="small" type="primary" :on-success="handleSuccess">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button class="btnAdd" type="primary" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%"
      :close-on-click-modal="false"
      @close="previewClosed"
    >
      <img :src="previewPath" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data(){
    return {
      currentStep: '0',
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_number:0,
        goods_weight:0,
        goods_cat:[],
        pics:[],
        goods_introduce:'',
        attrs: []
      },
      cateList: [],
      catCasProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      addFormRules:{
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ],
      },
      manyTabData:[],
      onlyTabData:[],
      uploadURL:'http://timemeetyou.com:8889/api/private/v1/upload',
      headersObj:{
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类列表失败");
      this.cateList = res.data;
    },
    catCasChange() {
      if (this.addForm.goods_cat.length != 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeTabLeave(activeName, oldActiveName){
      if(oldActiveName === '0' && this.addForm.goods_cat.length != 3){
        this.$message.error('请先选择商品分类');
        return false;
      }
    },
    async tabClicked(){
      if(this.currentStep === '1'){
        const { data: res } = await this.$http.get(
          `categories/${this.catId}/attributes`,
          {
            params: { sel: 'many' },
          }
        );
        if (res.meta.status !== 200)
          return this.$message.error("获取动态参数失败");
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [];
        });
        this.manyTabData = res.data;
      }else if(this.currentStep === '2'){
        const { data: res } = await this.$http.get(
          `categories/${this.catId}/attributes`,
          {
            params: { sel: 'only' },
          }
        );
        if (res.meta.status !== 200)
          return this.$message.error("获取静态属性失败");
        this.onlyTabData = res.data;
      }
    },
    handlePreview(file){
      this.previewPath = file.response.data.url;
      console.log(this.previewPath);
      this.previewVisible = true;
    },
    handleRemove(file){
      const filePath = file.response.data.tmp_path;
      const index = this.addForm.pics.findIndex(x => x.pic === filePath);
      this.addForm.pics.splice(index, 1);
    },
    handleSuccess(response){
      const picInfo = {pic: response.data.tmp_path};
      this.addForm.pics.push(picInfo);
    },
    previewClosed(){
      this.previewPath = '';
    },
    add(){
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error("请填写表单项！");
        //向服务器发起请求
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(',');
        //处理动态参数
        this.manyTabData.forEach(item => {
          const newInfo = { attr_id: item.attr_id,attr_value: item.attr_vals.join(' ')};
          this.addForm.attrs.push(newInfo);
        })
        this.onlyTabData.forEach(item => {
          const newInfo = { attr_id: item.attr_id,attr_value: item.attr_vals};
          this.addForm.attrs.push(newInfo);
        })
        form.attrs = this.addForm.attrs;
        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) return this.$message.error("商品新增失败");
        this.$message.success("商品新增成功");
        this.$router.push('/goods');
      });
    }
  },
  computed:{
    catId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  }
}
</script>

<style lang="less" scoped>
.el-checkbox{
  margin: 0 5px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>